Question

I have the following code:

FILE *fp;
double Data[9][7];
int i=0,k;                  
fp = fopen ( "dstest 2.mod", "r" ) ;
fscanf(fp, "%E %E %E %E %E %E %E*[ ]",
           &Data[i][0],
           &Data[i][1],
           &Data[i][2],
           &Data[i][3],
           &Data[i][4],
           &Data[i][5],
           &Data[i][6] );

But whenever I run it I get the following warnings:

Read.c:12: warning: format ‘%E’ expects type ‘float *’, but argument 3 has type ‘double *’

And it goes for all the arguments (Data[i][j]). I have no idea what’s wrong. The problem goes away when I use float Data instead of double data. But that will not fit in my requirements.

Answer 1

man scanf says that you need the l modifier character to read a double:

fscanf(fp, "%lE %lE...

and so on.